This is the guide to a blitzcrank easy enough for my noob friends to dominate with, now i pass it on to you. The rylais makes his passive slow by 30% every 2 seconds making it a perm slow just for running next to them. The trinity force allows u to do even more damage once you hook and rocket punch. the reason u only get rocket punch level 1 for a while is that you should never have to rocket punch someone twice if you land your hook to a turret or an ally. the 2nd ability allows you to keep up with them and attack them very fast so you are not useless after you combo.

PROS:
Turret hooking is fun early game
Mid game the trinity rylais will keep things slowed for good support.
can do damage to tanks no matter how much resistance.

Cons:
support hero.
Becomes more of a support late game
Nuker.
Barely any tank.

GLHF